It wouldn't be so bad if the correct zone for bringing up the hidden area obeyed Fitt's Law, but (A) the zone isn't directly at the top of the window, and (B) t

It wouldn't be so bad if the correct zone for bringing up the hidden area obeyed Fitt's Law, but (A) the zone isn't directly at the top of the window, and (B) that wouldn't work with non-maximised windows anyway. It's why hiding toolbars dynamically works well in macOS' fullscreen mode; flinging your mouse to the top of the screen always shows the menubar and toolbar without fail (unless the mouse is captured by the app, of course, like in a game).